numerical dispersion

Both methods suppress the observed numerical dispersion and the perfectly matched layer absorbing boundary reflection effect.

同时观测FCT方法压制数值频散与PML完全匹配层吸收边界反射的效果。

In order to reduce the numerical dispersion, it need more fine net grids, usually, smaller than 1/ 10 wavelengh. But it will cause more computer memory and long time.

为了减小色散，需要更为精细的网格单元，通常要小于波长的1／10，但这样会消耗更多的计算机内存和计算时间。

The time interval and space interval of the differential equations can be determined by analysis of stabilization and the theory of numerical dispersion.

利用傅立叶变换法计算出此算法的收敛域，结合时域有限差分法的数值色散理论确定出时间和空间步距。

Numerical Dispersion Analysis of the PML Absorbing Boundary Condition Based Finite Difference Time Domain Method

PML吸收边界的时域有限差分法的数值色散研究

Stability, numerical dispersion and boundary condition are the several key problems in the seismic modeling.

稳定性, 数值频散和边界是数值模拟中的关键性问题.